Battery-tester



L. L. LASKA.

BATTERY TESTER.

APPLICATION FILED Aue.9. 1919.

1,388,727. Patenmug. 23,1921.

f1 O /l jm/vanter,

, To @ZZ whom t may concern.

UNITED ESTATES PATENT-4 OFFICE.

LEWIS LINGOLN/YLASYKA, OF CORDOVA, TERRITORY OF ALASKA.

IBATTERY-TESTER.

.Be it known that l, Lnwis L. Lasne, a citizen of the United States, residing at Cordova, Territory of Alaska, have invented certain new and useful Improvements in a Battery-Tester, of which the following is a specification.

This inventionhasfor its object to provide a. convenient and compact device for testing the vstrength of dry batteries of the type used in flashlights.

Another object is the provision vof a device of this character in which a'series of incandescent lamps of varying voltages is utilized for indicatingthe strength ofthe battery, the poles of the latter being engage able with conveniently accessible contact elements for completing the circuit from the battery to the respective lamps.

llVith these and otherobjects in view as j will appear as the description proceedsthe invention comprises the novel features of construction combination of elements and arrangement of parts which will be more fully described in the following specication and lset lforth with particularity in the claims appended hereto. Y

Figure 1 represents a front elevation of the improved battery tester, n

Fig. 2 represents a front elevation thereof, the cover plate being removed,

Fig. A3 represents ya transverse sectional view through the tester, v

Fig. 4 represents a perspective view of the socket member for the detachable flexible conductor removed from the tester, and,

Fig. 5 represents a perspective view of the expansible lamp socket removed from the body plate. l

Referring to the drawing, wherein similar reference numerals designate corresponding parts throughout the several views, .they numeral 5 indicates a body plate constructed` of wood orV other insulating material having a coat of shellac or other liquid coating coniposition applied thereto capable of rendering l'he material of the body plate waterroo p A series of lamp sockets 6 and 14 is arranged adjacent one edge of the body plate 5 in a row extending longitudinally thereof and the sockets project through a row of apertures formed in a removable cover plate 7 which is secured in position upon amarginal flange 8 provided upon the body plate Specification of Letters Patent.

Patented Aug. 23, 1921;'

Application filed August 9, 1919'. Serial No. 316,411.

5 by screws or equivalent fastening de-V vices 9( Eachof the several lamp sockets 6 is formed with the usual internal screwthreads to fit. the externally screw threadedv base portion of an incandescent lamp 10 and the inner lclosedV terminal thereof is provided in the side or threaded portion with an aperf ture receiving a contact strip 12 secured in position upon the body plate 5 by a screw or equivalent fastening element 13. The lamp socket 14 at the-end -of the series 6 is formed with diametrically opposed slits 15 and, owing to the inherent resiliency of the material from which the lamp socket is constructed, the latter may be slightly .expanded to accommodate lamps of varying sizes. The expansible lamp socket 14 is elec` trically connected with a contact strip'12 y and t-he several strips are electrically connected by aconductor 16 extending along the front face of the'body member 5 in spaced relation to one of the side flanges thereof. l

The contact strips v12 are secured in position by screws 17 having headed front terminals which overlie the contact strips 12 securely clamping the latter inengagement withthe inner terminals of the sockets 6 and 14. Suitable insulators are interposed between the screws 17 andthe lamp sockets 6 and 14 and-nuts 19. are fitted upon the rear screw threaded terminals of` the screws which project through apertures formed in the body plate 5. The nuts 19 are preferably countersunk in the body plate and suitable insulation covers the nuts and screw terminals.

Medially olf-set contact strips 18 are secured between the body plate and the nuts 19 whereby the screws 17 are electrically connected therewith and the opposite terminals of the off-set contact strips lie in facial abutment with the front of the body plate 5.

Screws 2O are fitted in the exposed terminals of the olf-set contact strips 18 and secure the adjacent terminals of the several conductors21 thereto. The opposite termi# nals of the conductors are engaged about the frontterminals of aseries of bolts or screws 22 which are extended through the body plate 5 andare arranged along a line extending longitudinally thereof, one of the screws 22 being located directly beneath eachk of the several lamp sockets 6 and 14. The

headed terminals` of the screws 22 are countersunk in the rear surface of the body plate 5 and nuts 23 are threaded upon the front terminals of the screws and secure the terminals of the conductors 21 thereto.

The portion of the marginal flange 8 opposite the conductor '16 is provided with an aperture receiving a socket member 24 having a threaded axial bore 25 in one terminal and a transverse aperture 26 in the opposite terminal, the latter receiving a screw 27 whereby the socket member is secured in position lupon the body plate. A conductor 28 is secured by the securing member 27 and is electricallyconnected at its opposite terminal with the conductor 16 whereby an electrical connection between the socket member 2e and the several contact strips l2 is established.

For convenience in establishing an `electrical connection between the socket member 24e and the pole of the battery opposite that engaged by one ot the screws 22, a flexible conductor 29 is provided and carries, at one terminal, a threaded Vstem 30 engageable in theV threaded terminal of the socket member 2i whereby the terminal ofl the flexible conductor is detachably securedv thereto. The opposite terminal of the flexible conductor is provided with a contact pin 31 for engagement with the pole of the battery.

The several screws 22 are extended forwardiy through the cover plate 7,' as suggested in Fig. 3, for convenience in, engaging the pole ot a battery therewith and these projecting terminals of thescrews constitute electrodes or contact points.

Another advantage of the utilization in the expansible lamp socket 14 resides in the convenience afforded in testing electric lamps having the reflectors 32 attached directly thereto as in numerous conventional types of flash lights. VOwing to the expansii The several lamps l0 are designed for o J-,

eration by electrical'currents of varying vo t- Y ages and by engaging the contact pin 31 at one terminal of the fiexible conductor 29 with one pole of the battery and engaging the opposite pole of the battery successively with the several screws 22, the strength of the battery may be readily determined by the brilliancy of' the filaments of the lamps. If preferred, a suitable type of reflector 32 may be` attached tov one of the lamps 10, preferably the one engaged in the split expansible socket 14.

What I claim is: l

l. A battery tester including a body plate, a plurality of incandescent lampssupported therein, a contact point arranged opposite each incandescent lamp andelectrically connected therewith, said contact points being engageable with one pole of an electric battery, a socket member electrically connected with the several incandescent lamps, and a yflexible contact element detachably engaged with the socket member engageable with the opposite pole ofv the battery.

2. A battery tester including a body plate, a series of incandescent lamps arranged thereon, ak contactpoint arranged opposite each lamp and being electrically connected therewith, said contact point being engageable with one pole of an electric battery, a socket member secured to the body' plate having electric connection with the several lamps, a flexible conductor, aterminal car# ried by the conductor engageable with the socket member, and a contact ypin at the opposite terminal of the flexible conductor engageable with the `opposite pole of the electric battery.

In ytestimony whereof I ax my signature hereto. bility oit the socket, the latter readily ex- Lnwrs LINCOLN LAsKA.v 

